time
freq
P12 -05 P12-05
Pump #2 on AC Mains Pump #2 off
Pump #3 on AC Mains Pump #3 off
Diagram 12-9: Sequence of switching motors at fixed quantity control with PID – Increasing Demand
However, if the flow quantity or pressure is too big, CFP2000 will stop, one by one, the motors from
using mains electricity until CFP2000 decrease the main motor’s frequency to 0Hz. See diagram
12-10 and diagram 12-11.
Diagram 12-10: Sequence of switching motors at fixed quantity control with PID – Decreasing Demand
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